html, body {
  width: 100%;
  height: 100%;
  box-sizing: border-box;
}

*,
*::before,
*::after {
  box-sizing: inherit;
}

body {
  margin: 0 auto;
  padding: 10px 20px;
  max-width: 800px;
  line-height: 1.5;
}

@media screen and (max-width: 839px) {
  ol, ul {
    padding-left: clamp(16px, 6vw, 40px);
  }
}

@media (prefers-color-scheme: light) {
  body {
    background-color: #fff;
    color: #333;
  }
}

@media (prefers-color-scheme: dark) {
  body {
    background-color: #000;
    color: #ddd;
  }

  a:link {
    color: #00ccff;
  }

  a:visited {
    color: #cc00ff;
  }
}